During Life in Utero,oxygenation of the Fetus Occurs Through Transplacental

question 3

Multiple Choice

During life in utero,oxygenation of the fetus occurs through transplacental gas exchange.When birth occurs,four factors combine to stimulate the respiratory center in the medulla.The initiation of respiration then follows.Which is not one of these essential factors?

• A)Chemical
• B)Mechanical
• C)Thermal
• D)Psychologic

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Definitions:

Vector

A living organism, such as an insect, that carries microorganisms from an infected person to another person.

Microorganisms

Tiny life forms such as bacteria, viruses, fungi, and protozoa that exist in virtually all environments on the planet.

Infection Cycle

A sequence of events that involve the spread of pathogens, from their source through a means of transmission, to a susceptible host.

Pathogen Established

Refers to the successful colonization and growth of a disease-causing microorganism within a host.